Chapter 8. Configuring the node port service range
As a cluster administrator, you can expand the available node port range. If your cluster uses of a large number of node ports, you might need to increase the number of available ports.
The default port range is 30000-32767. You can never reduce the port range, even if you first expand it beyond the default range.
8.1. Prerequisites
-
Your cluster infrastructure must allow access to the ports that you specify within the expanded range. For example, if you expand the node port range to
30000-32900, the inclusive port range of32768-32900must be allowed by your firewall or packet filtering configuration.
8.2. Expanding the node port range
You can expand the node port range for the cluster.
Prerequisites
-
Install the OpenShift CLI (
oc). -
Log in to the cluster with a user with
cluster-adminprivileges.
Procedure
To expand the node port range, enter the following command. Replace
<port>with the largest port number in the new range.$ oc patch network.config.openshift.io cluster --type=merge -p \ '{ "spec": { "serviceNodePortRange": "30000-<port>" } }'Example output
network.config.openshift.io/cluster patched
To confirm that the configuration is active, enter the following command. It can take several minutes for the update to apply.
$ oc get configmaps -n openshift-kube-apiserver config \ -o jsonpath="{.data['config\.yaml']}" | \ grep -Eo '"service-node-port-range":["[[:digit:]]+-[[:digit:]]+"]'Example output
"service-node-port-range":["30000-33000"]
